HMS, BM EQ-Bank 892

A rock climber has been scaling a difficult route for 30 minutes.

Outline how the digestive and endocrine systems interact to provide energy to the muscular system during this prolonged, intense activity. (3 marks)

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Sample Answer

Glucose provision:

Digestive system releases glucose from recent food intake.
Liver glycogen converts to glucose via glycogenolysis.
Blood glucose maintained for muscle use.

Hormonal regulation:

Glucagon triggers liver glycogen breakdown.
Adrenaline mobilises energy stores rapidly.
Cortisol releases fatty acids from adipose tissue.

Energy coordination:

Multiple fuel sources support prolonged effort.
Hormones prioritise energy for working muscles.
Systems preserve glycogen through fat utilisation.

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Sample Answer

Glucose provision:

Digestive system releases glucose from recent food intake.
Liver glycogen converts to glucose via glycogenolysis.
Blood glucose maintained for muscle use.

Hormonal regulation:

Glucagon triggers liver glycogen breakdown.
Adrenaline mobilises energy stores rapidly.
Cortisol releases fatty acids from adipose tissue.

Energy coordination:

Multiple fuel sources support prolonged effort.
Hormones prioritise energy for working muscles.
Systems preserve glycogen through fat utilisation.